Features: - As far as I know ALL O2 sensors are the same thread fits all M18x1.5mm threaded oxygen sensors - FITS MOST STANDARD CAR OXYGEN SENSOR: All the thread size of the oxygen sensor extender is M18x1.5mm, so the oxygen adapter is applicable to most modern vehicle cars and easily screwed into upstream and downstream o2 sensor and car exhaust, and fits most car's O2 sensor threaded socket or tool. - RIGID STEEL CONSTRUCTION: Each bung o2 sensor is constructed of mild steel to avoid cracking and excessive heat expansion. After each o2 oxygen sensor spacer is manufactured it is coated in a durable corrosion resistant plating a polished to a mirror finish. Specification: Material: mild steel and nickel plated Quantity: 2Pcs Packing included: 2 x O2 Oxygen Sensor Note: 1. Please allow 1-3cm (0.4-1.18") difference due to manual measurement and slight color variation for different display setting. 2. Due to the light and screen difference, the item's color may be slightly different from the pictures. Please understand.